Ĭarminati A, Vetterlein D, Koebernick N, Blaser S, Weller U, Vogel HJ (2013) Do roots mind the gap? Plant Soil 367:651–661. īudak H, Hussain B, Khan Z, Ozturk NZ, Ullah N (2015) From genetics to functional genomics: improvement in drought signaling and tolerance in wheat. īrown LK, George TS, Thompson JA, Wright G, Lyon J, Dupuy L, Hubbard SF, White PJ (2012) What are the implications of variation in root hair length on tolerance to phosphorus deficiency in combination with water stress in barley ( Hordeum vulgare)? Ann Bot 110:319–328. īoyer JS (1982) Plant productivity and environment. īowne JB, Erwin TA, Juttner J, Schnurbusch T, Langridge P, Bacic A, Roessner U (2012) Drought responses of leaf tissues from wheat cultivars of differing drought tolerance at the metabolite level. īolouri-Moghaddam MR, Le Roy K, Xiang L, Rolland F, Van den Ende W (2010) Sugar signalling and antioxidant network connections in plant cells. īenjamin JG, Nielsen DC (2006) Water deficit effects on root distribution of soybean, field pea and chickpea.
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īengough AG, Bransby MF, Hans J, McKenna SJ, Roberts TJ, Valentine TA (2006) Root responses to soil physical conditions growth dynamics from field to cell. īaxter A, Mittler R, Suzuki N (2014) ROS as key players in plant stress signalling. īarré P, Hallett PD (2009) Rheological stabilization of wet soils by model root and fungal exudates depends on clay mineralogy. (15)30803-6īao Y, Aggarwal P, Robbins NE, Sturrock CJ, Thompson MC, Tan HQ, Tham C, Duan LN, Rodriguez PL, Vernoux T, Mooney SJ, Bennett MJ, Dinneny JR (2014) Plant roots use a patterning mechanism to position lateral root branches toward available water. īailey C, Scholes M (1997) Rhizosheath occurrence in South African grasses. Additionally, our results highlight the importance of using metabolite profiling and provide a better understanding of rhizosheath formation at the cellular level.Īlqudah AM, Samarah NH, Mullen RE (2011) Alternative farming systems, biotechnology, drought stress and ecological fertilisation. Difference in rhizosheath size is reflected in the plant internal metabolites under drought stress conditions. Several metabolites including amino acids (arginine, isoleucine, methionine and cysteine) and sugars (kestose, raffinose, fructose, fucose, sorbose and xylose) in the large soil-sheathed roots of Alamo and Kanlow were significantly increased compared to small or no soil-sheathed roots of Alamo and Kanlow. In this study, the levels of amino acids, sugars and organic acids were significantly changed in response to drought stress in two switchgrass ecotypes. For root morphological parameters, Alamo grew deeper than Kanlow, while Kanlow exhibited higher values for other parameters. The change trends of root hair length and density, lateral root number and related gene expression were consistent with rhizosheath weight in Alamo and Kanlow under drought and watered conditions. Gas chromatography mass spectrophotometry (GC–MS) was used to determine the primary metabolites in the shoots and roots of selected ecotypes under drought stress conditions. Kanlow), root hair length and density, lateral root number, root morphological parameters were measured, and real-time qRT-PCR was performed. For two selected ecotypes with contrast rhizosheath weight (cv. Kanlow) have a broad range of rhizosheath weight under drought conditions. (switchgrass), which belongs to the Poaceae family, is an important biofuel and fodder crop in drought areas. The aim of this work is to reveal the potential metabolites involved in rhizosheath formation under drought stress conditions. The rhizosheath comprises soil that adheres firmly to roots by a combination of root hairs and mucilage and may aid in root growth under soil drying.
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In this study, two ecotypes of switchgrass with different rhizosheath sizes after drought stress were analyzed which showed metabolic differences under drought conditions.
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Rhizosheath comprises soil that adheres firmly to roots.